83 lines
3.5 KiB
C
83 lines
3.5 KiB
C
|
/* $NetBSD: fpbits.h,v 1.1 2002/06/05 01:04:25 fredette Exp $ */
|
||
|
|
|
||
|
|
/* $OpenBSD: fpbits.h,v 1.4 2001/03/29 03:58:18 mickey Exp $ */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copyright 1996 1995 by Open Software Foundation, Inc.
|
||
|
|
* All Rights Reserved
|
||
|
|
*
|
||
|
|
* Permission to use, copy, modify, and distribute this software and
|
||
|
|
* its documentation for any purpose and without fee is hereby granted,
|
||
|
|
* provided that the above copyright notice appears in all copies and
|
||
|
|
* that both the copyright notice and this permission notice appear in
|
||
|
|
* supporting documentation.
|
||
|
|
*
|
||
|
|
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
|
||
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||
|
|
* FOR A PARTICULAR PURPOSE.
|
||
|
|
*
|
||
|
|
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
|
||
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
||
|
|
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
|
||
|
|
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
|
||
|
|
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* pmk1.1
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* (c) Copyright 1986 HEWLETT-PACKARD COMPANY
|
||
|
|
*
|
||
|
|
* To anyone who acknowledges that this file is provided "AS IS"
|
||
|
|
* without any express or implied warranty:
|
||
|
|
* permission to use, copy, modify, and distribute this file
|
||
|
|
* for any purpose is hereby granted without fee, provided that
|
||
|
|
* the above copyright notice and this notice appears in all
|
||
|
|
* copies, and that the name of Hewlett-Packard Company not be
|
||
|
|
* used in advertising or publicity pertaining to distribution
|
||
|
|
* of the software without specific, written prior permission.
|
||
|
|
* Hewlett-Packard Company makes no representations about the
|
||
|
|
* suitability of this software for any purpose.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* These macros are designed to be portable to all machines that have
|
||
|
|
* a wordsize greater than or equal to 32 bits that support the portable
|
||
|
|
* C compiler and the standard C preprocessor. Wordsize (default 32)
|
||
|
|
* and bitfield assignment (default left-to-right, unlike VAX, PDP-11)
|
||
|
|
* should be predefined using the constants HOSTWDSZ and BITFRL and
|
||
|
|
* the C compiler "-D" flag (e.g., -DHOSTWDSZ=36 -DBITFLR for the DEC-20).
|
||
|
|
* Note that the macro arguments assume that the integer being referenced
|
||
|
|
* is a 32-bit integer (right-justified on the 20) and that bit 0 is the
|
||
|
|
* most significant bit.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef HOSTWDSZ
|
||
|
|
#define HOSTWDSZ 32
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*########################### Macros ######################################*/
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------
|
||
|
|
* NewDeclareBitField_Reference - Declare a structure similar to the simulator
|
||
|
|
* function "DeclBitfR" except its use is restricted to occur within a larger
|
||
|
|
* enclosing structure or union definition. This declaration is an unnamed
|
||
|
|
* structure with the argument, name, as the member name and the argument,
|
||
|
|
* uname, as the element name.
|
||
|
|
*----------------------------------------------------------------------- */
|
||
|
|
#define Bitfield_extract(start, length, object) \
|
||
|
|
((object) >> (HOSTWDSZ - (start) - (length)) & \
|
||
|
|
((unsigned)-1 >> (HOSTWDSZ - (length))))
|
||
|
|
|
||
|
|
#define Bitfield_signed_extract(start, length, object) \
|
||
|
|
((int)((object) << start) >> (HOSTWDSZ - (length)))
|
||
|
|
|
||
|
|
#define Bitfield_mask(start, len, object) \
|
||
|
|
((object) & (((unsigned)-1 >> (HOSTWDSZ-len)) << (HOSTWDSZ-start-len)))
|
||
|
|
|
||
|
|
#define Bitfield_deposit(value,start,len,object) object = \
|
||
|
|
((object) & ~(((unsigned)-1 >> (HOSTWDSZ-(len))) << (HOSTWDSZ-(start)-(len)))) | \
|
||
|
|
(((value) & ((unsigned)-1 >> (HOSTWDSZ-(len)))) << (HOSTWDSZ-(start)-(len)))
|
||
|
|
|